What if that belief is that you're fine being an LGBTQ person, and the "challenge" is from people who believe that you shouldn't exist or have the same rights as others?
Cutting off communication between groups doesn't prevent violence. It creates echo chambers that allow them to drift further and further apart. At some point, the only way they can communicate is violence.
Talking to them opens an opportunity for mutual understanding, while dismissing them changes nothing.
EDIT: I don't know why you're being downvoted. You've proposed a great example.